<!DOCTYPE html>
<html>
	<head>
<meta name="viewport" content="width=device-width"/>
		<meta charset="UTF-8">
	</head>
        <body>
<ol>
   <a href="人人网.html" <li>一作业</li></a>
   <a href="网易.html"   <li>二作业</li></a>
     <a href="albb.html"    <li>三作业</li></a>
          <a href="QQ.html" <li>四作业</li></a>
</ol>
</body>
</html>